Cement.



No Drawing.

To all whom it may concern:

Be it known that I, BRUCE O. DAVEY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful improvement in Cement, of which the following is a specification.

My invention relates to oxychlorid cement for use, more'particularly, in forming the scratch, or foundation, coat of cement walls, or the like, one of the more particular uses tOWlllCll my invention is placed being that of forming exterior stueco-surfacings for Walls of buildings.-

My objects, generally stated, are to provide an improved cement for the purposes above stated which shall be-relati'vely inexpensi've, of relatively light Weight and present a highdegree of elasticity, whereby a wall, or partition, or surface-coating formed therefrom, will not crack when subjected to unequal or non-uniform stresses to- Y which structures of this character under different conditions of use and weather, are subjected; i;

My improved cement, as I prefer to make I it, consists of a mixture of calcined magnesite, longand short-fiber asbestos, sand,' chlorid of magnesiumand granulated cork. It is preferred that the calcined magnesit'e,

asbestos, cork and sand be thoroughly mixed 'togetherand when it is desired to u'sethe cement, to add thereto a solution of chlorld of magnesium, causing the mass to becomo'- plastic and in in to use. in the making .of the cement I prefer to provide the different ingredients in the proportions as follows: r

500 pounds calcined magnesite; 100 pounds short-fiber asbestos; 32 pounds long-fiber asbestos; 1068 pounds sand preferably white glass sharp sa 300 pounds granulated cork of about 20 mesh.

suitable condition for apply Specification of ;Letters Patent.

UNITED STATES PATENT OFFICE.

Patented, J an- 8, .1918.

Application filed March 11, 1916. Serial No. 83,565.

The ingredients above stated are preferably thoroughly mixedtogether in any suitable form of mixer, the mixture thus pro vided being dry, \Vhen the cement is to be used, there is added to the mixture just referred to 160 gallons of a solution of water andchlorid of magnesium, mixedin such proportions as to cause the solution of chlorid of magnesium to have a specific gravity of about $20 Baum. All of the ingredients above stated are thoroughly mixed together in a mixing-box and the cement thus produced and in plastic condition is ready to be applied to use, the cement becoming i set by subjection to the atmosphere.

he admixture of the cork with the other ingredients is very advantageous from a. practical standpoint. It not only serves to furnish body to the mass, without impairing its efficiency, with the result of greatly reducing the cost of the cement and reducing its welght, but causes the mass to present a high degree of elasticity, enabling a wall or The effect of the short fiber asbestos is to I make the composition fatty and cause it to be workedeasily, wh1le the long fiber asbes tos acts as a binder.

What I claim aslnew and desiretorsecure by Letters Patent is:-

1. A new compositioii'of matter comprising calcined magnesite, longand short-fiber asbestos, the latter in sufiicient quantity to make it Work easy, chlorid of magnesium and'particles of cork of about 20 mesh. l 2. A new composition of matter comprising calcined magnesite, sand, longand,

short fiber asbestos, thelatter in sufficient quantity to make it work easy, chlorid of magnesium and particles of cork of about 20 mesh.

BRUCE o. DAVEY. 

